347ac6ef58
use fastclock timer (pit2) to measure cpufreq in guesscpuhz(). this gives a bigger period minimizing the danger of overrun as pit2 runs at the constant maximum period of 0x10000 ticks. also use smaller loop increments (1000) and bigger maximum loop upper bound. move the loops < ... check to the bottom of the loop so we get the effective count *before* adding the next loop increment. ilock() while doing measurements in guesscpuhz() to prevent accidents with other processors reading fastclock or doing guesscpuhz() in parralel. export new i8253reset() function for apm to reset the timers after a apm bios suspend. |
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